The X-rated treetop show staged by two lovebirds – a Bronx 17-year-old and his transgender “girlfriend” – started out as a despair-fueled suicide bid, the teen told The Post yesterday.

“Everyone’s been attacking us since we’ve been together, especially my mother,” said Christopher Montero following his arraignment at Manhattan Criminal Court yesterday. “We just wanted to end it that day.”

Montero said he and his pre-operative transsexual lover, 32-year-old William Rund, slept in Central Park Thursday morning after Rund had quarreled with his roommate.

Montero and Rund are both on antidepressants to combat bipolar disorder and the two were “very stressed out,” the teen said. “Once we climbed up, we talked about jumping in an attempt to show our love for each other,” Montero said.

Instead, the two spent four hours in negotiations with cops. Witnesses said the pair – dressed only in underwear – engaged in sex acts.

He was charged with a slew of misdemeanors and released. Rund was still being evaluated yesterday at Bellevue Hospital.